The Parts Kit,diaphragm Replacement, cataloged under National Stock Number 4820-01-142-4158, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Diving Unlimited International Inc. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-142-4158 |
| Primary Part Number | 4CRK02 |
| Item Name | Parts Kit,diaphragm Replacement |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Diving Unlimited International Inc |
| Status | ACTIVE |
| Component Quantity | 41 |
| Nonsupply Items and Quantities | 54611 D1018 DIAPHRAGM 3,54611 D1020 SEAT 6,54611 D1021 VALVE 6,54611 D1022 RING 6,54611 302SS SPRING 6,54611 D1023 RETAINER 6,54611 D1035 O-RING 6,54611 D1073 O-RING 1,54611 D1074 O-RING 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4CRK02 PRIMARY | Diving Unlimited International Inc (USA) |
| Reference | Meaning |
|---|---|
| 321016001 | 5/9 Secondary reference Diving Unlimited International Inc |
NSN 4820-01-142-4158 is a Parts Kit,diaphragm Replacement, manufactured by Diving Unlimited International Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-142-4158 has 1 manufacturer part number on file: 4CRK02 (Diving Unlimited International Inc).
Key specifications for 4CRK02: Component Quantity: 41; Nonsupply Items and Quantities: 54611 D1018 DIAPHRAGM 3,54611 D1020 SEAT 6,54611 D1021 VALVE 6,54611 D1022 RING 6,54611 302SS SPRING 6,54611 D1023 RETAINER 6,54611 D1035 O-RING 6,54611 D1073 O-RING 1,54611 D1074 O-RING 1. 2 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.